Question: Who are the participants in the Battle of Greece, which is a member of the Organisation for the Prohibition of Chemical Weapons?
Paraphrase: Who are the members within the Battle of Greece, which could be a part of the Association for the Disallowance of Chemical Weapons?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q2888837 wdt:P710 ?answer . ?answer wdt:P463 wd:Q842490}
Answer: United Kingdom